What is the domain of f(x)=sqrt((x+3)/(x-3)) ?

The domain of f(x)=sqrt((x+3)/(x-3)) is x 3

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domain of f(x)=sqrt((x+3)/(x-3))

domain

f (x) = \frac{x + 3}{x - 3}

x \leq - 3 or x > 3

Interval Notation

(- \infty, - 3] \cup (3, \infty)

Solution steps

Find non-negative values for radicals:

x \leq - 3 or x > 3

Find undefined (singularity) points:

x = 3

Combine real regions and undefined points for final function domain

x \leq - 3 or x > 3

What is the domain of f(x)=sqrt((x+3)/(x-3)) ?
The domain of f(x)=sqrt((x+3)/(x-3)) is x<=-3\lor x>3